#include <stdio.h>
#include <stdlib.h>
#include "oled.h"
#include "OLED_Font.h"

//0.96寸OLED 屏幕简称SSD1106
//OLED的显存
//存放格式如下.
//[0]0 1 2 3 ... 127	
//[1]0 1 2 3 ... 127	
//[2]0 1 2 3 ... 127	
//[3]0 1 2 3 ... 127	
//[4]0 1 2 3 ... 127	
//[5]0 1 2 3 ... 127	
//[6]0 1 2 3 ... 127	
//[7]0 1 2 3 ... 127 			   


//向SSD1106写入一个字节。
//dat:要写入的数据/命令
//cmd:数据/命令标志 0,表示命令;1,表示数据;
void OLED_WR_Byte(unsigned char dat,unsigned char cmd)
{	
	unsigned char i;			  
	if(cmd)
	  OLED_DC_Set();
	else 
	  OLED_DC_Clr();		  

	for(i=0;i<8;i++)
	{			  
		OLED_SCLK_Clr();
		if(dat&0x80)
		   OLED_SDIN_Set();
		else 
		   OLED_SDIN_Clr();
		OLED_SCLK_Set();
		dat<<=1;   
	}				 		  

	OLED_DC_Set();   	  
} 

void OLED_Set_Pos(unsigned char x, unsigned char y) 
{ 
	OLED_WR_Byte(0xb0+y,OLED_CMD);
	OLED_WR_Byte(((x&0xf0)>>4)|0x10,OLED_CMD);
	OLED_WR_Byte((x&0x0f)|0x01,OLED_CMD); 
}   	  
//开启OLED显示  
void OLED_Display_On(void)
{
	OLED_WR_Byte(0X8D,OLED_CMD);  //SET DCDC命令
	OLED_WR_Byte(0X14,OLED_CMD);  //DCDC ON
	OLED_WR_Byte(0XAF,OLED_CMD);  //DISPLAY ON
}
//关闭OLED显示    
void OLED_Display_Off(void)
{
	OLED_WR_Byte(0X8D,OLED_CMD);  //SET DCDC命令
	OLED_WR_Byte(0X10,OLED_CMD);  //DCDC OFF
	OLED_WR_Byte(0XAE,OLED_CMD);  //DISPLAY OFF
}		   			 
//清屏函数,清完屏,整个屏幕是黑色	 	  
void OLED_Clear(void)  
{  
	unsigned char i,n;		    
	for(i=0;i<8;i++)  
	{  
		OLED_WR_Byte (0xb0+i,OLED_CMD);    //设置页地址（0~7）
		OLED_WR_Byte (0x02,OLED_CMD);      //设置显示位置—列低地址
		OLED_WR_Byte (0x10,OLED_CMD);      //设置显示位置—列高地址  
		for(n=0;n<128;n++)OLED_WR_Byte(0,OLED_DATA); 
	} //更新显示
}


//在指定位置显示一个字符,包括部分字符
//x:0~127
//y:0~7 
void OLED_ShowChar(unsigned char x,unsigned char y,unsigned char chr)
{      	
	unsigned char c=0,i=0;	
	c=chr-' ';//得到偏移后的值			
	if(x>Max_Column-1){x=0;y=y+2;}
	if(SIZE ==16)
	{
		OLED_Set_Pos(x,y);	
		for(i=0;i<8;i++)
		OLED_WR_Byte(F8X16[c*16+i],OLED_DATA);
		OLED_Set_Pos(x,y+1);
		for(i=0;i<8;i++)
		OLED_WR_Byte(F8X16[c*16+i+8],OLED_DATA);
	}
	else 
	{	
		OLED_Set_Pos(x,y+1);
		for(i=0;i<6;i++)
		OLED_WR_Byte(F6x8[c][i],OLED_DATA);
	}
}
//m^n函数
unsigned long oled_pow(unsigned char m,unsigned char n)
{
	unsigned long result=1;	 
	while(n--)result*=m;    
	return result;
}				  
//显示2个数字
//x,y :起点坐标	 
//len :数字的位数
//size:字体大小
//mode:模式	0,填充模式;1,叠加模式
//num:数值(0~4294967295);			  
void OLED_ShowNum(unsigned char x,unsigned char y,unsigned long num,unsigned char len,unsigned char size)
{         	
	unsigned char t,temp;
	unsigned char enshow=0;						   
	for(t=0;t<len;t++)
	{
		temp=(num/oled_pow(10,len-t-1))%10;
		if(enshow==0&&t<(len-1))
		{
			if(temp==0)
			{
				OLED_ShowChar(x+(size/2)*t,y,' ');
				continue;
			}else enshow=1; 
		 	 
		}
	 	OLED_ShowChar(x+(size/2)*t,y,temp+'0'); 
	}
} 
/**
  * @brief   显示一个字符号串
  * @param   x : uint8_t 起点列坐标 
  * @param   y : uint8_t 起点行坐标 
  * @param   chr : uint8_t *字符串指针
  * @retval  无
  */
void OLED_ShowString(unsigned char x,unsigned char y,unsigned char *chr)
{
	unsigned char j=0;
	while (chr[j]!='\0')
	{		OLED_ShowChar(x,y,chr[j]);
			x+=8;
		if(x>120){x=0;y+=2;}
			j++;
	}
}
//显示汉字，字模选项：
//点阵格式：阴码
//取模方式：列行式
//取模走向：逆向
//每行显示：16 * 16
//C51格式
//x:0~127
//y:0~7页
void OLED_ShowCHinese(unsigned char x,unsigned char y,unsigned char no)
{      			    
	unsigned char t,adder=0;
	OLED_Set_Pos(x,y);	
    for(t=0;t<16;t++)
	{
		OLED_WR_Byte(Chinese_char[2*no][t],OLED_DATA);
		adder+=1;
    }	
	OLED_Set_Pos(x,y+1);//下一页（0-7）	
    for(t=0;t<16;t++)
	{	
		OLED_WR_Byte(Chinese_char[2*no+1][t],OLED_DATA);
		adder+=1;
    }					
}
/***********功能描述：显示显示BMP图片128×64起始点坐标(x,y),x的范围0～127，y为页的范围0～7*****************/
void OLED_DrawBMP(unsigned char x0, unsigned char y0,unsigned char x1, unsigned char y1,unsigned char BMP[])
{ 	
	unsigned int j=0;
	unsigned char x,y;

	if(y1%8==0) y=y1/8;      
	else y=y1/8+1;
	for(y=y0;y<y1;y++)
	{
		OLED_Set_Pos(x0,y);
    for(x=x0;x<x1;x++)
	    {      
	    	OLED_WR_Byte(BMP[j++],OLED_DATA);	    	
	    }
	}
} 


//初始化OLED				    
void CS_OLED_Init(void)
{
	GPIO_InitTypeDef GPIO_InitStruct;
	
	__HAL_RCC_GPIOA_CLK_ENABLE();

	//RST
	GPIO_InitStruct.Pin = OLED_RST_GPIO_PIN;
	GPIO_InitStruct.Mode = GPIO_MODE_OUTPUT_PP;
	GPIO_InitStruct.Pull = GPIO_PULLUP;
	GPIO_InitStruct.Speed = GPIO_SPEED_FREQ_HIGH;
	HAL_GPIO_Init(OLED_RST_GPIO, &GPIO_InitStruct);

	//DC
	GPIO_InitStruct.Pin = OLED_DC_GPIO_PIN;
    GPIO_InitStruct.Mode = GPIO_MODE_OUTPUT_PP;
    GPIO_InitStruct.Pull = GPIO_PULLUP;
    GPIO_InitStruct.Speed = GPIO_SPEED_FREQ_HIGH;
    HAL_GPIO_Init(OLED_DC_GPIO, &GPIO_InitStruct);

	//SCLK
	GPIO_InitStruct.Pin = OLED_SCLK_GPIO_PIN;
    GPIO_InitStruct.Mode = GPIO_MODE_OUTPUT_PP;
    GPIO_InitStruct.Pull = GPIO_PULLUP;
    GPIO_InitStruct.Speed = GPIO_SPEED_FREQ_HIGH;
    HAL_GPIO_Init(OLED_SCLK_GPIO, &GPIO_InitStruct);

	//SDIN
	GPIO_InitStruct.Pin = OLED_SDIN_GPIO_PIN;
    GPIO_InitStruct.Mode = GPIO_MODE_OUTPUT_PP;
    GPIO_InitStruct.Pull = GPIO_PULLUP;
    GPIO_InitStruct.Speed = GPIO_SPEED_FREQ_HIGH;
    HAL_GPIO_Init(OLED_SDIN_GPIO, &GPIO_InitStruct);

	HAL_GPIO_WritePin(OLED_RST_GPIO, OLED_RST_GPIO_PIN, GPIO_PIN_SET);
 	HAL_GPIO_WritePin(OLED_DC_GPIO, OLED_DC_GPIO_PIN, GPIO_PIN_SET);
	HAL_GPIO_WritePin(OLED_SCLK_GPIO, OLED_SCLK_GPIO_PIN, GPIO_PIN_SET);
	HAL_GPIO_WritePin(OLED_SDIN_GPIO, OLED_SDIN_GPIO_PIN, GPIO_PIN_SET);


	OLED_RST_Set();
	HAL_Delay(100);
	OLED_RST_Clr();
	HAL_Delay(100);
	OLED_RST_Set();

					  
	OLED_WR_Byte(0xAE,OLED_CMD);//--turn off oled panel
	OLED_WR_Byte(0x02,OLED_CMD);//---set low column address
	OLED_WR_Byte(0x10,OLED_CMD);//---set high column address
	OLED_WR_Byte(0x40,OLED_CMD);//--set start line address  Set Mapping RAM Display Start Line (0x00~0x3F)
	OLED_WR_Byte(0x81,OLED_CMD);//--set contrast control register
	OLED_WR_Byte(0xCF,OLED_CMD); // Set SEG Output Current Brightness
	OLED_WR_Byte(0xA1,OLED_CMD);//--Set SEG/Column Mapping     0xa0???? 0xa1??
	OLED_WR_Byte(0xC8,OLED_CMD);//Set COM/Row Scan Direction   0xc0???? 0xc8??
	OLED_WR_Byte(0xA6,OLED_CMD);//--set normal display
	OLED_WR_Byte(0xA8,OLED_CMD);//--set multiplex ratio(1 to 64)
	OLED_WR_Byte(0x3f,OLED_CMD);//--1/64 duty
	OLED_WR_Byte(0xD3,OLED_CMD);//-set display offset	Shift Mapping RAM Counter (0x00~0x3F)
	OLED_WR_Byte(0x00,OLED_CMD);//-not offset
	OLED_WR_Byte(0xd5,OLED_CMD);//--set display clock divide ratio/oscillator frequency
	OLED_WR_Byte(0x80,OLED_CMD);//--set divide ratio, Set Clock as 100 Frames/Sec
	OLED_WR_Byte(0xD9,OLED_CMD);//--set pre-charge period
	OLED_WR_Byte(0xF1,OLED_CMD);//Set Pre-Charge as 15 Clocks & Discharge as 1 Clock
	OLED_WR_Byte(0xDA,OLED_CMD);//--set com pins hardware configuration
	OLED_WR_Byte(0x12,OLED_CMD);
	OLED_WR_Byte(0xDB,OLED_CMD);//--set vcomh
	OLED_WR_Byte(0x40,OLED_CMD);//Set VCOM Deselect Level
	OLED_WR_Byte(0x20,OLED_CMD);//-Set Page Addressing Mode (0x00/0x01/0x02)
	OLED_WR_Byte(0x02,OLED_CMD);//
	OLED_WR_Byte(0x8D,OLED_CMD);//--set Charge Pump enable/disable
	OLED_WR_Byte(0x14,OLED_CMD);//--set(0x10) disable
	OLED_WR_Byte(0xA4,OLED_CMD);// Disable Entire Display On (0xa4/0xa5)
	OLED_WR_Byte(0xA6,OLED_CMD);// Disable Inverse Display On (0xa6/a7) 
	OLED_WR_Byte(0xAF,OLED_CMD);//--turn on oled panel
	
	OLED_WR_Byte(0xAF,OLED_CMD); /*display ON*/ 
	OLED_Clear();
	OLED_Set_Pos(0,0); 	
}  



